Bearmouth was never a mining camp in the conventional sense. It had no mines of its own, no stamp mill, no assay office, no boom-and-bust cycle driven by the discovery and exhaustion of ore. What it had was location: a point on the Clark Fork River where Bear Creek came in from the north, where the Mullan Military Road crossed the river, and where the Northern Pacific Railway would eventually build a station. Bearmouth existed to serve the camps that lay beyond it, the gold-bearing gulches of the Garnet Range that could only be reached by climbing steep mountain roads from the valley floor. It was a ferry crossing, a trading post, a stagecoach stop, a railhead, and a supply depot, and in each of those roles it was essential to the survival of the camps it served. When Garnet and Beartown and Coloma finally played out in the mid-twentieth century, Bearmouth had nothing left to serve, and it faded into the quiet roadside community it is today.

History

The origins of Bearmouth trace to 1862, when engineer John Mullan, building his military road through western Montana, contracted a local settler named Sam Hugo to construct a bridge near Medicine Tree Hill on the Clark Fork River. The bridge established a reliable crossing that evolved into a ferry operated by John Lannon, who would become one of the more prominent figures in the Bearmouth area's early history. The ferry was essential for the prospectors who were beginning to push into the gulches north of the river, and the crossing point became a natural location for a trading post.

In October 1865, a prospector named Jack Reynolds and his party discovered placer gold in Bear Gulch, the drainage that came down from the Garnet Range to meet the Clark Fork at Bearmouth. The discovery triggered a rush of miners into the area, and in 1866 a German immigrant named John C. Lehsou established the initial trading post at the river crossing, capitalizing on the traffic of men and supplies moving up the gulch to the new diggings. The community that formed around Lehsou's post was never large, but it was busy, a constant flow of miners, freighters, and supplies moving through on their way to and from the camps above.

The arrival of the Northern Pacific Railway in 1883 transformed Bearmouth's role in the regional economy. The transcontinental line's ceremonial golden spike had been driven at nearby Gold Creek on September 8, 1883, and the Bearmouth station became a vital point on the main line approximately 1,239 miles from St. Paul, Minnesota. What had been a wagon-road trading post became a railhead, and the economics of supplying the mountain camps changed accordingly. Ore from the Garnet district, including high-grade shipments from the Nancy Hanks mine that yielded over two hundred dollars a ton in profit per carload, was hauled by wagon or sleigh over a twelve-mile road to the Bearmouth station for rail transport to smelters in Anaconda, Helena, Butte, and Great Falls. The first ore shipments from the Mitchell-Mussigbrod Mill reached Bearmouth in the autumn of 1895.

The stagecoach lines that ran between Bearmouth and the mountain camps were operated by men like Frank Davey and Charlie Lewis, who hauled supplies up the steep twenty-mile routes to Garnet and brought ore and passengers back down. The trip took three and a half to four hours one way, and the stage ran daily during the mining season. A five-ton Shamrock boiler, delivered to the Bearmouth station in 1899, was transported up the mountain road by horse teams to power machinery at one of the Garnet mines, a logistical feat that illustrated both the difficulty of supplying the high-altitude camps and the determination of the men who ran them.

Bearmouth's community was always transient in character. The permanent residents were ranchers like the Lannon family, who had been at the crossing since the ferry days, and a handful of merchants and freighters who made their living from the traffic passing through. The miners who used Bearmouth as their supply point lived in the camps above, not in the valley, and the town never developed the social infrastructure of a genuine mining community. There were frontier hardships: stagecoach accidents on the steep mountain roads, the occasional violence that accompanied the movement of gold and cash through isolated country, and the tensions between white and Chinese laborers that characterized many of Montana's mining districts.

The decline of Bearmouth followed the decline of the camps it served. When Garnet was abandoned after a fire in 1912 and again after the gold mining restrictions of World War II, the traffic that had sustained Bearmouth's economy dried up. The community contracted to its ranching and roadside functions, and by the mid-twentieth century it was a quiet stop on the highway rather than a busy supply depot.

What Remains Today

Bearmouth today is a small unincorporated community on Interstate 90 in Granite County. The Bearmouth Fishing Access Site, managed by Montana Fish, Wildlife and Parks, occupies thirty-one acres along the Clark Fork River and was improved in 2016 with a boat ramp, parking, and sanitation facilities. The Bearmouth Rest Area along Interstate 90 offers amenities and interpretive markers on local geology and history. The Garnet Ghost Town, one of Montana's best-preserved mining communities, is accessible from Bearmouth via the Bear Gulch Road, an eleven-mile gravel route that climbs through mountain terrain to the historic site.

Visiting

Bearmouth is located on Interstate 90 approximately thirty-three miles east of Missoula and fifteen miles west of Drummond. The Bearmouth exit provides access to the fishing access site, the rest area, and the road to Garnet. The preferred approach to Garnet from the west follows Montana Route 200 eastward from Missoula, turning south onto the eleven-mile Garnet Range Road for a more gradual ascent. Garnet is managed by the Bureau of Land Management and is open to visitors from late May through October; winter access is by snowmobile or ski. Drummond, the nearest town with services, is fifteen miles to the east on Interstate 90.